Photoinduced hole-doping effect in (Y{sub 0.5}Ca{sub 0.5})Ba{sub 2}Cu{sub 3}O{sub {delta}} films
- Department of Physics and Materials Science Center, National Tsing Hua University, Hsinchu, Taiwan 300, Republic of (China)
The persistent photoinduced changes in the critical temperature T{sub C} and the normal state conductivity of (Y{sub 0.5}Ca{sub 0.5})Ba{sub 2}Cu{sub 3}O{sub {delta}} thin films are studied. Previously such effects have been observed only in underdoped YBa{sub 2}Cu{sub 3}O{sub {delta}} or YSr{sub x}Ba{sub 2{minus}x}Cu{sub 3}O{sub {delta}}, which always lead to the enhancement of both T{sub C} and conductivity. The current system can be doped from the underdoped regime to the overdoped regime by increasing its oxygen content. The photoinduced T{sub C} reduction in the overdoped films is observed. The simultaneous enhancement of conductivity is consistent with the interpretation that photoillumination always increases hole concentration in the {open_quotes}123{close_quotes} systems. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 552946
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 71; ISSN 0003-6951; ISSN APPLAB
- Country of Publication:
- United States
- Language:
- English
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